Stanley J309 300 Amp Jump Starter

Awesome! Plenty of jump start power. Purchased 1 from Amazon & another from my local hardware store(same model). Used 4 times in the last few days on our fleet vehicles. Cars/trucks/vans...no problems. Charging is easy on this model, just plug it in with an ordinary household AC extension cord or use the DC adapter supplied. Also, this unit has an on/off switch. My old one didn't so the terminals were 'HOT' all the time. Life saver device, well worth the bucks!

I bought this jumper to jump my motorcycle. The battery goes dead every winter and I am not in an area where I would be able to keep the battery charged over the winter (I am forced to park the thing out on the street). Anyway, this jumper works great I plugged it in, let it charge for a day (although I don't think it requires a full day to charge) and jumped my bike right up the battery on my bike was completely dead prior to the jump. Very easy, no problems.

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Nice features, well constructed. I plug it in to charge it up once a month. (more often than suggested) I let it charge for two full days when I charge it, indicators read full charge.

I needed to use it today because my car battery finally died (6 years old). I plugged the Stanley in to top up the charge, let it top up for two hours. Indicator showed full charge. Tried to start the car. Nothing. I could see sparks when I attached the battery, so I know there was juice, but just not enough to turn over the 6 cylinder engine.

The Stanley unit has a battery level indicator, before the attempt it read full charge. After, the indicator was in the middle. Back inside, I hook it up to charge it again, it reads low.

GM road side assistance showed up with a much beefier version of a portable battery source, and the car started up immediately.

This unit is one year old, so I am guessing that the internal battery just does not last, or can not actually supply the starting current that it claims.

Just a big beautiful paper weight. Go for a much beefier unit, or perhaps one with lithium ion batteries. Better yet, just subscribe to a road side assistance plan.

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My battery wouldn't hold a charge and I used this every day for 4 months to start my car and it exceeded my expectations. I never expected it to last that long, but with charging once every 3 weeks or so it worked fine. Small, portable, and much easier than jumper cables. Highly recommended.

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I shopped eBay and major retailers, and Amazon had the lowest price for this item. I had previously read online reviews of similar products and decided that Stanley offered the best, along with a trusted brand name.

Shopping at Amazon is so easy, I do it often.

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